Crossword Genius

Have an addition - to the family? (3)

Ross

I believe the answer is:

tot

I'm a little stuck... Click here to teach me more about this clue!

'have an addition' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I don't see?

'to the family?' is the wordplay.
I cannot quite understand how this works, but
'to' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for tot that I've seen before include "Spirit measure" , "Small drink of spirits" , "two fingers, perhaps" , "Add up for baby" , "A wee dram" .)

I've seen this clue in the Evening Standard.
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